Results 61 to 70 of about 4,580 (149)

Engineering Substrate Acceptance of Resveratrol O‐Methyltransferase from Vitis vinifera for the Selective Synthesis of O‐Methyl Protected Biobased Hydroxystyrenes

open access: yesChemCatChem, Volume 17, Issue 14, July 2025.
Reaction sequence for the synthesis of methylated products through enzymatic decarboxylation of bio‐based hydroxycinnamic acids and subsequent direct methylation of the resulting styrene intermediates without any further isolation and purification steps.
Kamela Myrtollari   +6 more
wiley   +1 more source

Optimizing Chlorogenic Acid Extraction From Spent Coffee Grounds: A Comparative Review of Conventional and Non‐Conventional Techniques

open access: yesFood Science &Nutrition, Volume 13, Issue 7, July 2025.
Spent coffee grounds are a rich source of chlorogenic acid, a compound with antioxidant, anti‐inflammatory, and antimicrobial properties. This review conducts a comparative analysis between the conventional and non‐conventional extraction techniques based on CGA yield, environmental sustainability, cost, and processing time.
Mariam Ramadan   +9 more
wiley   +1 more source

Catalysis With Deep Eutectic Solvents: Challenges and Opportunities

open access: yesChemCatChem, Volume 17, Issue 11, June 6, 2025.
Deep eutectic solvents (DESs) are emerging as sustainable alternatives in catalysis, offering tunable properties for diverse chemical transformations. This review explores the dual role of DESs as solvents and catalysts, highlighting advancements in organic chemistry, materials science, CO2 fixation, biomass valorization, polymer degradation, and ...
Eduardo Guzmán
wiley   +1 more source

The Impact of Salt Concentration on the Screening of Surfactant Packages for EOR Applications

open access: yesEnergy Science &Engineering, Volume 13, Issue 6, Page 3296-3306, June 2025.
ABSTRACT This study focuses on improving surfactant solubility for enhanced oil recovery (EOR) in high‐temperature, high‐salinity reservoirs, addressing challenges in chemical flooding. Surfactant performance is influenced by wettability, contact angle, capillary forces, and interfacial tension (IFT).
Máté Hartyányi   +4 more
wiley   +1 more source

Advanced glycoxidation and lipoxidation end products (AGEs and ALEs): an overview of their mechanisms of formation [PDF]

open access: yes, 2013
Advanced lipoxidation end products (ALEs) and advanced glycation end products (AGEs) have a pathogenetic role in the development and progression of different oxidative-based diseases including diabetes, atherosclerosis, and neurological disorders.
A. Cipak   +219 more
core   +1 more source

Assessment and Risk Analysis of Nitrosamines in Sausages From Northern Iran

open access: yesFood Science &Nutrition, Volume 13, Issue 6, June 2025.
This study evaluates nitrosamine levels in chicken and red meat sausages from northern Iran, identifying health risks for consumers. Using high‐performance liquid chromatography (HPLC), significant variations in nitrosamine concentrations were observed, with red meat sausages showing the highest levels.
Mohammad Sadegh Allahkhah   +1 more
wiley   +1 more source

Enzyme catalysis with small ionic liquid quantities [PDF]

open access: yes, 2018
Enzyme catalysis with minimal ionic liquid quantities improves reaction rates, stereoselectivity and enables solvent-free processing. In particular the widely used lipases combine well with many ionic liquids.
Fischer, Fabian   +2 more
core  

The effect of isoelectric amino acids on the pH(+) of a phosphate buffer solution - A contribution in support of the "Zwitter Ion" hypothesis [PDF]

open access: yes, 1930
The relative merits of the classical conception and of the Zwitter Ion conception of the dissociation of amphoteric electrolytes are discussed, and the following data are presented which confirm the Zwitter Ion hypothesis of Bjerrum, and which are not in
Borsook, Henry, MacFadyen, Douglas A.
core  

Preparativne modifikacije askomicina. V. Dobivanje novih derivata pomoću zamjene cikloheksilvinilidenske podjedinice [PDF]

open access: yes, 2005
Starting from the easily accessible 24-O-tert-butyldimethylsilyl-22(R)-dihydro-28-oxoascomycin, methodologies that allow replacement of the cyclohexylvinylidene moiety of ascomycin by various other substituents are described.
Ewald Haidl   +5 more
core   +1 more source

Synthesis of Substrates for Cyclization Studies Using Phenylselenium Ion and for Hydrovinylation Reactions [PDF]

open access: yes, 2010
Development of novel methods for making useful, enantiopure pharmaceutical compounds is an active area of current synthetic organic chemistry research.
Yozwiak, Carrie
core  

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